Should we Upload images to Google Drive or Google Photos?

With most cloud storage services there is a _cost_ associated with storing photos.
Granted, the cost is low e.g $0.03 per GB (_per month_) on AWS S3 ... but it _can_ add up if you have _many_ photos e.g. 100GB is $36 per year and that would _**only increase over time**_...

So, if _instead_ of using AWS S3 we use Google Drive or Google Photos we get **15 GB** "_**Free**_":

or "_**Unlimited Free**_" (_Google Photos_):

> See:
> - Drive Storage: https://www.google.com/settings/storage
> - Photos: https://www.google.com/photos/about/
> - http://www.makeuseof.com/tag/free-unlimited-photo-storage-more-google-photos/
> - http://www.marketwatch.com/story/google-will-store-your-photos-for-free-but-is-there-a-privacy-cost-2015-06-03
> - http://www.extremetech.com/mobile/206990-google-photos-unlimited-storage-for-free-with-a-few-gotchas

@iteles thoughts...?